The U.S. Air Force has blocked access for computers on its network to The New York Times, the Guardian, and at least 23 other websites carrying WikiLeaks documents, a spokesman said on Tuesday.

Major Toni Tones, a spokesperson at Air Force Space Command in Colorado, said the command blocked at least 25 websites that have posted WikiLeaks documents.

The Air Force “routinely blocks Air Force network access to websites hosting inappropriate materials or malware (malicious software) and this includes any website that hosts classified materials and those that are released by WikiLeaks,” she said.